CVE-2026-111231: pfSense CE 0 through 2.9.0

Affected technology

pfSense CE · 0 through 2.9.0
Netgate

Description’s affected range: through 2.9.0

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · High privileges required · No user interaction required

What an attacker can do

Read-only WebGUI users can replace config.xml because config_restore() and config_install() ignore the 'User - Config: Deny Config Write' privilege. Vendor/CNA’s CVSS 4.0 assessment (base score 8.6/10) rates confidentiality, integrity and availability impact as high.